We can do this for you or if you like, click on the contact link at the bottom of the page to reach the help desk. Make the request for a username change and let them know what name you would like.
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roadfix-awe! I know! I'm having second thoughts. It's so easy to sign in with the four letter name. hehe And obviously I like it too. The only reason was...well, i'm not sure it matters anymore.